1. Dallas City Hall

DOWNTOWN.   Abstract and avant-garde best describe this architectural monument. The Dallas City Hall Building officially opened in 1978. The structure, which was designed by renowned architect I.M. Pei, measures 560 feet long and 122 feet high. Resembling an inverted pyramid, the unique exterior stands 10 stories high. The city hall complex sits on a six-acre plaza and is worth visiting solely to see how the horizontal design complements Dallas' rising skyline.   (© 10Best)

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